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    <script>
        function Star(uname,age){
            this.uname = uname ;
            this.age = age ;
            // this.sing = function(){
            //     console.log("我会唱歌");
            // }
        }
        //很多情况下(我们修改了原型对象)，我们需要手动的利用constructor这个属性指回 原来的构造函数
        // Star.prototype.sing = function(){
        //     console.log("我会唱歌");
        // }
        Star.prototype = {
            constructor:Star,
            sing:function(){
                console.log('我会唱歌');
            },
            movie:function(){
                console.log('我会跳舞');
            }
            
        }
        var ldh = new Star('刘德华',18);
        var zxy = new Star('张学友',18);
        console.log(ldh.__proto__);
        console.log(Star.prototype);
        // console.log(ldh.__proto__.constructor);
        // console.log(Star.prototype.constructor);
        
    </script>
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